32 



SYSTEMATIC ZOOLOGY 



est order of living Rhizopoda, and include about a quarter of the 

 fossil Protozoa. As fossils they are found along the coast of the 



fjc.caps.pr 



sh.Z 





A.3 



cent, caps 



71U, 



sh.J 



Fig. 12. Actinomma asteracantkion. A, with portions of the two outer spheres of the 

 shell broken away ; B, a section, cent, caps, central capsule ; ex. caps, pr, extracapsular 

 protoplasm ; nit, nucleus; sk.i, outer, sk.o., middle, .^.3, inner, sphere of skeleton. Alter 

 Haeckel and Hertwig, from Parker and Hasweil's Manual.) 



Fir.. 13. Collozoum inerme. A, B, C, three forms of the entire colony, natural size. D, a 

 small colony enlarged, showing numerous central capsules and vacuoles. E, spores 

 containing crystals. F, macrospore and microspore, c, crystals; c.caps, central < ap- 

 sules; nit, nucleus; vac, vacuoles. (After Hertwig and Brandt, from Parker and Hasweil's 

 Manual.) 



